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Title: Direct in situ measurement of coupled magnetostructural evolution in a ferromagnetic shape memory alloy and its theoretical modeling

Abstract

In this study, ferromagnetic shape memory alloys (FSMAs) have shown great potential as active components in next generation smart devices due to their exceptionally large magnetic-field-induced strains and fast response times. During application of magnetic fields in FSMAs, as is common in several magnetoelastic smart materials, there occurs simultaneous rotation of magnetic moments and reorientation of twin variants, resolving which, although critical for design of new materials and devices, has been difficult to achieve quantitatively with current characterization methods. At the same time, theoretical modeling of these phenomena also faced limitations due to uncertainties in values of physical properties such as magnetocrystalline anisotropy energy (MCA), especially for off-stoichiometric FSMA compositions. Here, in situ polarized neutron diffraction is used to measure directly the extents of both magnetic moments rotation and crystallographic twin-reorientation in an FSMA single crystal during the application of magnetic fields. Additionally, high-resolution neutron scattering measurements and first-principles calculations based on fully relativistic density functional theory are used to determine accurately the MCA for the compositionally disordered alloy of Ni2Mn1.14Ga0.86. The results from these state-of-the-art experiments and calculations are self-consistently described within a phenomenological framework, which provides quantitative insights into the energetics of magnetostructural coupling in FSMAs. Based onmore » the current model, the energy for magnetoelastic twin boundaries propagation for the studied alloy is estimated to be ~150kJ/m3.« less

Authors:
 [1];  [2];  [3];  [3];  [3];  [3];  [3];  [3];  [3];  [3];  [3];  [4];  [1]
  1. City Univ. of Hong Kong, Kowloon (Hong Kong)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  4. Ludwig Maximilian Univ., Munich (Germany)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1235868
Alternate Identifier(s):
OSTI ID: 1223556
Report Number(s):
BNL-111660-2015-JA
Journal ID: ISSN 1098-0121; PRBMDO; R&D Project: PO010; KC0201060
Grant/Contract Number:  
SC00112704; AC05-00OR22725; AC02-98CH10886
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 92; Journal Issue: 13; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Pramanick, Abhijit, Shapiro, Steve M., Glavic, Artur, Samolyuk, German, Aczel, Adam A., Lauter, Valeria, Ambaye, Haile, Gai, Zheng, Ma, Jie, Stoica, Alexandru D., Stocks, G. Malcolm, Wimmer, Sebastian, and Wang, Xun -Li. Direct in situ measurement of coupled magnetostructural evolution in a ferromagnetic shape memory alloy and its theoretical modeling. United States: N. p., 2015. Web. doi:10.1103/PhysRevB.92.134109.
Pramanick, Abhijit, Shapiro, Steve M., Glavic, Artur, Samolyuk, German, Aczel, Adam A., Lauter, Valeria, Ambaye, Haile, Gai, Zheng, Ma, Jie, Stoica, Alexandru D., Stocks, G. Malcolm, Wimmer, Sebastian, & Wang, Xun -Li. Direct in situ measurement of coupled magnetostructural evolution in a ferromagnetic shape memory alloy and its theoretical modeling. United States. https://doi.org/10.1103/PhysRevB.92.134109
Pramanick, Abhijit, Shapiro, Steve M., Glavic, Artur, Samolyuk, German, Aczel, Adam A., Lauter, Valeria, Ambaye, Haile, Gai, Zheng, Ma, Jie, Stoica, Alexandru D., Stocks, G. Malcolm, Wimmer, Sebastian, and Wang, Xun -Li. 2015. "Direct in situ measurement of coupled magnetostructural evolution in a ferromagnetic shape memory alloy and its theoretical modeling". United States. https://doi.org/10.1103/PhysRevB.92.134109. https://www.osti.gov/servlets/purl/1235868.
@article{osti_1235868,
title = {Direct in situ measurement of coupled magnetostructural evolution in a ferromagnetic shape memory alloy and its theoretical modeling},
author = {Pramanick, Abhijit and Shapiro, Steve M. and Glavic, Artur and Samolyuk, German and Aczel, Adam A. and Lauter, Valeria and Ambaye, Haile and Gai, Zheng and Ma, Jie and Stoica, Alexandru D. and Stocks, G. Malcolm and Wimmer, Sebastian and Wang, Xun -Li},
abstractNote = {In this study, ferromagnetic shape memory alloys (FSMAs) have shown great potential as active components in next generation smart devices due to their exceptionally large magnetic-field-induced strains and fast response times. During application of magnetic fields in FSMAs, as is common in several magnetoelastic smart materials, there occurs simultaneous rotation of magnetic moments and reorientation of twin variants, resolving which, although critical for design of new materials and devices, has been difficult to achieve quantitatively with current characterization methods. At the same time, theoretical modeling of these phenomena also faced limitations due to uncertainties in values of physical properties such as magnetocrystalline anisotropy energy (MCA), especially for off-stoichiometric FSMA compositions. Here, in situ polarized neutron diffraction is used to measure directly the extents of both magnetic moments rotation and crystallographic twin-reorientation in an FSMA single crystal during the application of magnetic fields. Additionally, high-resolution neutron scattering measurements and first-principles calculations based on fully relativistic density functional theory are used to determine accurately the MCA for the compositionally disordered alloy of Ni2Mn1.14Ga0.86. The results from these state-of-the-art experiments and calculations are self-consistently described within a phenomenological framework, which provides quantitative insights into the energetics of magnetostructural coupling in FSMAs. Based on the current model, the energy for magnetoelastic twin boundaries propagation for the studied alloy is estimated to be ~150kJ/m3.},
doi = {10.1103/PhysRevB.92.134109},
url = {https://www.osti.gov/biblio/1235868}, journal = {Physical Review. B, Condensed Matter and Materials Physics},
issn = {1098-0121},
number = 13,
volume = 92,
place = {United States},
year = {Wed Oct 14 00:00:00 EDT 2015},
month = {Wed Oct 14 00:00:00 EDT 2015}
}

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Cited by: 7 works
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